/*
 * Copyright 2003-2005 the original author or authors.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * 
 */
package com.jdon.jivejdon.dao;

import com.jdon.controller.model.PageIterator;
import com.jdon.jivejdon.model.Forum;
import com.jdon.jivejdon.model.query.QueryCriteria;

/**
 * @author <a href="mailto:banqiao@jdon.com">banq</a>
 *
 */
public interface ForumDao {

    Forum getForum(Long id);
    void createForum(Forum forum);
    void updateForum(Forum forum);
    void deleteForum(Forum forum);
    PageIterator getForums(int start, int count);
  
    public int getMessageCount(Long forumId);
    
    /**
     * get the thread count from thread db.
     * @param forumId
     * @return
     */
    public int getThreadCount(Long forumId);
    /**
     * get laste message from the message db
     * 
     */
    public Long getLastPostMessageId(Long forumId);
    
    void clearCache();
    
}
